var RAND = 18;
	var DIRECTIONS = "DIRECTIONS: Circle the congruent shapes.";
	var t = 0;
 	CORRECT = new Array (9);
	SCREENIMAGE = new Array ("con0.gif","con1.gif","con2.gif","con3.gif","con4.gif","con5.gif","con6.gif","con7.gif","con8.gif","con9.gif","con10.gif","con11.gif","con12.gif","con13.gif","con14.gif","con15.gif","con16.gif","con17.gif","con18.gif","con_0.gif","con_1.gif","con_2.gif","con_3.gif","con_4.gif","con_5.gif","con_6.gif","con_7.gif","con_8.gif","con_9.gif","con_10.gif","con_11.gif","con_12.gif","con_13.gif","con_14.gif","con_15.gif","con_16.gif","con_17.gif","con_18.gif");

      	function GetShape() 
	{
		for (i = 0; i < 5; i++)
		{
			NUMBER = Math.random() * RAND;
        		 NUMBER = Math.round (NUMBER);
			NUMBER1 = Math.random() * RAND;
        		 NUMBER1 = Math.round (NUMBER1);
			NUMBER2 = Math.random() * RAND;
        		 NUMBER2 = Math.round (NUMBER2);
			if (NUMBER == NUMBER1 || NUMBER == NUMBER2 || NUMBER1 == NUMBER2)
			{
				i = 1;
			}
			else
			{
				break;
			}
		}
		NUMBER3 = NUMBER + 19;
		t++;
		CHOICE = Math.random() * 3;
        	 CHOICE = Math.round (CHOICE);
		switch (t)
		{
			case 1:
				switch (CHOICE)
				{
					case 0:
    						document.images.SHAPE1.src  = SCREENIMAGE[NUMBER];
    						document.images.SHAPE2.src  = SCREENIMAGE[NUMBER1];
    						document.images.SHAPE3.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE4.src  = SCREENIMAGE[NUMBER3];
					break;
					case 1:
    						document.images.SHAPE1.src  = SCREENIMAGE[NUMBER3];
    						document.images.SHAPE2.src  = SCREENIMAGE[NUMBER];
    						document.images.SHAPE3.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE4.src  = SCREENIMAGE[NUMBER1];
					break;
					case 2:
    						document.images.SHAPE1.src  = SCREENIMAGE[NUMBER1];
    						document.images.SHAPE2.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE3.src  = SCREENIMAGE[NUMBER];
    						document.images.SHAPE4.src  = SCREENIMAGE[NUMBER3];
					break;
					case 3:
    						document.images.SHAPE1.src  = SCREENIMAGE[NUMBER3];
    						document.images.SHAPE2.src  = SCREENIMAGE[NUMBER1];
    						document.images.SHAPE3.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE4.src  = SCREENIMAGE[NUMBER];
					break;
				}
				document.images.SHAPE17.src  = SCREENIMAGE[NUMBER];
				document.images.SHAPE21.src  = SCREENIMAGE[NUMBER3];
			break;
			case 2:
				switch (CHOICE)
				{
					case 0:
    						document.images.SHAPE5.src  = SCREENIMAGE[NUMBER];
    						document.images.SHAPE6.src  = SCREENIMAGE[NUMBER1];
    						document.images.SHAPE7.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE8.src  = SCREENIMAGE[NUMBER3];
					break;
					case 1:
    						document.images.SHAPE5.src  = SCREENIMAGE[NUMBER3];
    						document.images.SHAPE6.src  = SCREENIMAGE[NUMBER];
    						document.images.SHAPE7.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE8.src  = SCREENIMAGE[NUMBER1];
					break;
					case 2:
    						document.images.SHAPE5.src  = SCREENIMAGE[NUMBER1];
    						document.images.SHAPE6.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE7.src  = SCREENIMAGE[NUMBER];
    						document.images.SHAPE8.src  = SCREENIMAGE[NUMBER3];
					break;
					case 3:
    						document.images.SHAPE5.src  = SCREENIMAGE[NUMBER3];
    						document.images.SHAPE6.src  = SCREENIMAGE[NUMBER1];
    						document.images.SHAPE7.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE8.src  = SCREENIMAGE[NUMBER];
					break;
				}
				document.images.SHAPE18.src  = SCREENIMAGE[NUMBER];
				document.images.SHAPE22.src  = SCREENIMAGE[NUMBER3];
			break;
			case 3:
				switch (CHOICE)
				{
					case 0:
    						document.images.SHAPE9.src  = SCREENIMAGE[NUMBER];
    						document.images.SHAPE10.src  = SCREENIMAGE[NUMBER1];
    						document.images.SHAPE11.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE12.src  = SCREENIMAGE[NUMBER3];
					break;
					case 1:
    						document.images.SHAPE9.src  = SCREENIMAGE[NUMBER3];
    						document.images.SHAPE10.src  = SCREENIMAGE[NUMBER];
    						document.images.SHAPE11.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE12.src  = SCREENIMAGE[NUMBER1];
					break;
					case 2:
    						document.images.SHAPE9.src  = SCREENIMAGE[NUMBER1];
    						document.images.SHAPE10.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE11.src  = SCREENIMAGE[NUMBER];
    						document.images.SHAPE12.src  = SCREENIMAGE[NUMBER3];
					break;
					case 3:
    						document.images.SHAPE9.src  = SCREENIMAGE[NUMBER3];
    						document.images.SHAPE10.src  = SCREENIMAGE[NUMBER1];
    						document.images.SHAPE11.src  = SCREENIMAGE[NUMBER2];
    						document.images.SHAPE12.src  = SCREENIMAGE[NUMBER];
					break;
				}
				document.images.SHAPE19.src  = SCREENIMAGE[NUMBER];
				document.images.SHAPE23.src  = SCREENIMAGE[NUMBER3];
			break;
		}
      	}